Sharpening device.



G. P. BNGELHARD 8; M. U. REI'NIG. SHARPENING DEVICE.

W11 ESE APPLICATION FILED FEB. 1,1909.

Patented Feb. 1, 1910.

GEORGE P. ENGELHARD AND MICHAEL G. BEINIG', OF CHICAGO, ILLINOIS.

SHARPENING DEVICE.

aaaisi.

Specification of Letters Patent.

Patented Feb. 1, 1910.

To all whom it may concern:

Be it known that we, GEORGE P. ENGEL- HARD and MICHAEL G. REINIG,citizens of the United States, and residing at Chicago, in the county ofCook and State of Illinois, have invented a new and useful Improvementin Sharpening Devices, of which the following is a completespecification.

This invention relates to improvements in sharpening devices and moreparticularly to a chalk sharpening device for tailors use.

Heretofore devices of this character have been so constructed that ifthe chalk breaks while being sharpened the hand is apt to be forcedagainst the knives or cutters and seriously injured. Furthermore in thedevices as heretofore constructed the sharpening mechanism has beenrigidly bolted or otherwise secured to its support so that its removalis rendered difiicult.

The object of this invention is to provide a chalk sharpener in whichthe cutting mechanism is so protected that the danger of injury thereonwhile in operation is entirely obviated.

It is also an object of the invention to provide a device in which thesharpening mechanism may be quickly removed from its support whendesired but which is rigidly held from turning therein.

The invention consists of the matters hereinafter described in thespecification and more fully pointed out and defined in the appendedclaims.

In the drawings: Figure l is aperspective view of the device embodyingmy invention.

Fig. 2 is a transverse section of the recep" tacle with the sharpeningmechanism removed. Fig. 3 is a perspective view of the sharpeningmechanism. Fig. a is a side elevation of one of the knives. Fig. 5 is arear elevation of the pin holder.

As shown in said drawings: A indicates a receptacle of any desiredmaterial and construction, though which is preferably rectangular inshape and which is provided with a removable cover at having alongitudinal slot a therein.

As shown the cover is secured on the receptacle by means of screws athough it may be removably secured thereon 1n any other desired manner,and the upper surface of the cover, adjacent the slot, is beveled downtoward the slot, as at a to reduce the thickness at that point and tocause any particles of chalk that may fall thereon to be deposited inthe receptacle.

The end walls a of the receptacle are provided on their inner faces withupwardly and inwardly opening, downwardly tapering seats a, one situatedon each side of the slot a in the cover, and in which the cuttingmechanism, indicated as a whole by B is adapted to be supported. Saidcutting mechanism comprises a plurality of blades 1), each having a Vshaped notch in its upper edge providing double cutting edges b,andbetween the ends of said blades on each side of the notches areseparators of leather or other desired material. The separators be tweentwo adjacent blades are spaced a distance apart so as to provide acentral opening through which the particles of chalk may fall to thebottom of the receptacle. Said blades and separators are securedtogether by means of rods Z2 which pass through the same, one on eachside of the notches, and the ends thereof are screw threaded to receivethe nuts Z9 which hold the blades and separators securely in place. Saidrods are of such length that the projecting ends thereof may seat in theseats a when the cutting mechanism is in place in the receptacle.

If preferred, and as shown in Fig. 1, a pin holder C may be attached tothe receptacle to provide a combined pin holder and chalk sharpener.Said pin holder comprises a tray 0 having on the rear thereof a hopper cin the top of which is provided a slot 0 in which the pins are placed.Said hopper is relatively long and narrow so that it will always directthe pins into the tray in parallel relation to each other. The back 0 ofsaid hopper is provided with a slot 0 as shown in Fig. 5, adapted to behooked on to a pin, not shown, projecting from the end of the receptacleA.

In operation the sharpening mechanism is placed in the receptacle withthe ends of the rods b seated in the seats The cover a is then securedin place with its slot above and in alinement with the row of notches inthe blades 6. The chalk D is then inserted through the slot, which alsoacts as a guide to hold the chalk in true vertical po sition, and thelower edge thereof is drawn along the notches in the usual manner.Should the chalk break or the hand he released therefrom by accident thehand will contact with the smooth surface of the cover and be preventedfrom, striking the blades and being injured.

Obviously a chalk sharpener embodying our invention is adapted to afiordprotection to the hand of the operator and the cutting mechanism may bequickly removed and replaced when desired. Obviously also many detailsof form and construction may be Varied without departing from theprinciples of our invention.

\Ve claim as our invention.

1. In a device of the class described the combination with a receptacleof a cover therefor provided with a longitudinal slot, upwardly andinwardly opening seats in said receptacle, two situated at each side ofsaid slot, parallel rods adapted to be supported in said seats, cuttingmechaninm removably secured on said rods and means for tightening saidcutting mechanism on the rods.

2. The combination with a receptacle of a cover therefor having alongitudinal slot therein, a pair of seats in each end of saidreceptacle, said seats being disposed beneath and laterally of the endsof the slot, rods seated at their ends in said seats, blades having Vshaped notches in their tops providing cutting edges and each providedwith a pair of apertures to receive said rods, separators on each rodbetween said blades and providing openings between correspondinglaterally disposed separators, and nuts on each end of said rods withinthe receptacle adapted to be set up against said blades and separatorsand hold them from movement on the rods.

In testimony whereof we have hereunto subscribed our names in thepresence of two witnesses.

GEORGE P. ENGELHARD. MICHAEL C. REINIG. lVitnesses JosnPH SOHLENKER,HANS PAnBsT.

